My Scale Model of the Sears Tower (With Pictures!)
Ever since I went up the Sears Tower two summers ago, I’ve been fascinated by the architectural design of the thing. It’s built with what is called a bundled-tube structure, and consequently it usually appears asymmetrical when you look at it from the side. But it’s built in a series of phases that are all perfectly symmetrical, except for the very top and narrowest phase (which, I learned on the Wikipedia page, causes it to lean 10 cm from vertical).
So ever since we got Charlie some Duplo Lego blocks for his birthday, I’ve often tried to hurriedly make a model of the Sears Tower before he can knock it over or start adding blocks that made it look like abstract art. But it never looked quite right, and I wasn’t sure why. It bothered me more and more; I would even think about it lying in bed at night. How did all those bundled tubes fit together? How many were there? Which ones went how high? Finally I’d had enough and resolved one afternoon to do it right. A quick Google search quickly turned up this extremely helpful schematic.
As you can see from the A-A, B-B, C-C, and D-D grids down the left-hand side, it turns out to be somewhat simple to build with Duplo Lego building blocks, each of the nine squares being composed of one two-by-two Duplo block. But then I was sure we wouldn’t have enough blocks to finish a three-dimensional scale model, so after supper Jess and I took Charlie for a surprise visit to Toys R Us to buy “him” some new Legos. Then we got home and put Charlie to bed so I could commence playing with his toys for the rest of the evening.
I decided to build each phase with a different color, which solved the problem of not having enough of one color to make it look uniform, and it highlighted the four phases, making it easier to see how the tower is actually built. So what follows is a stage-by-stage pictorial, with my comments along the way.
Phase 1 (A-A in the schematic above):
Not very exciting, I know, but there you go. Even with the extra Legos, I didn’t have enough regular greens. All the middle pieces (not visible) are orange and black, and as you can see there are some blocks mixed in that we call “puke green.” (Charlie has picked up on this, calling them “poo gee”).
Phases 1 & 2 (A-A + B-B): Phases two and three (B-B and C-C) are actually a little more complicated to build than it looks, but I’m not going to bother explaining why.
Phases 1, 2, & 3 (A-A + B-B + C-C):
Then it’s just a matter of plunking on four blue bricks, and voila! Sears Tower.
Phases 1, 2, 3, & 4 (A-A + B-B + C-C + D-D):
The colors in the final product are a little misleading in terms of design, because each of the nine squares is built as a single tube that goes all the way to the ground, but this at least highlights the various shapes that emerge out of the whole and makes clear why its shape is somewhat disorienting when looked at from the ground. The proportions of each stage (i.e., the “number of floors”) are also a little off because of block shortages and the fact that Duplo blocks are so large. But hey, Sears Tower.
It lasted three days before Charlie destroyed it.